Premium Quality: Made of high quality TCT carbide (tungsten carbide tipped cutter), high quality titanium coated carbide teeth, ensuring high hardness, anti-rust, robustness and durability. < p>Dimensions: Cutting diameter: 35mm, cutting depth: 25mm, shaft diameter: 10mm, perfect for drilling hard metals Unique three-blade design: This TCT hole saw is equipped with three blades, including an outer blade and a middle blade and an inner blade, which makes it sharper and more efficient, ideal for cutting hard metals 【Versatile tools】This carbide hole saw set is suitable for bench drill, magnetic drill, pistol drill, impact drill, etc. Perfect for hard metals, stainless steel plates, square tubes, iron, cast iron, wood, GRP and other conventional sheet metal. Note: Cannot be used for concrete, tiles and stone. High precision and easy to use: TCT carbide steel teeth for fast cutting of round and clean holes. Suitable for hand drills, motorized floor drills and moving belt magnetic drills;